Warning signs that an individual may be at risk for suicide included (Marcus, 1996):
Absence of a sense of purpose in life.
Preoccupation with death, including talk of feeling hopeless and helpless.
Giving away prized possessions.
Discussing specific methods and a time for killing oneself.
Increased substance use.
Isolation and withdrawal from friends and family.
Extreme changes of behavior and sudden personality changes.
Previous suicidal threats or comments.